From: Paul Eggert <eggert@cs.ucla.edu>
To: "Mattias Engdegård" <mattias.engdegard@gmail.com>
Cc: 70898@debbugs.gnu.org
Subject: bug#70898: switching to <stdbit.h> for Emacs bit ops
Date: Mon, 13 May 2024 09:56:46 -0700 [thread overview]
Message-ID: <b394aa86-5753-4c55-997b-7e32ef491e99@cs.ucla.edu> (raw)
In-Reply-To: <69689DCA-4836-49F2-B163-0F5D151FF03F@gmail.com>
On 2024-05-13 07:34, Mattias Engdegård wrote:
> Has C23 been frozen yet? The most recent accessible draft I could find was N3096.
It's not final, but it's pretty frozen. I doubt whether the stdbit spec
will change.
Yes, n3096 is the latest public draft.
> Overall happy with the changes but haven't read them in detail.
> Minor things I stumbled upon:
>
>> @@ -4269,7 +4263,9 @@ endif
>> ## begin gnulib module verify
>> ifeq (,$(OMIT_GNULIB_MODULE_verify))
>>
>> +ifneq (,$(gl_GNULIB_ENABLED_verify_CONDITION))
>>
>> +endif
>
> Unfinished work?
That was generated automatically by gnulib-tool and is harmless. That
being said, I installed a change to the Gnulib stdbit module for other
reasons (porting to theoretical platforms where C integers are wider
than 256 bits!) here:
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=9768940fbd11558b8dab3453aa419a3433933d50
and I expect that will remove the harmless code by removing the
conditional dependency on Gnulib's assert-h module.
>> +/* 1 if supported, -1 if not, 0 if unknown. */
>> +extern signed char __gl_stdint_popcount_support;
>
> `__gl_stdbit_popcount_support`, maybe?
Thanks, fixed here:
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=9deb8e8891e36968deeb93bd666670f7950d1095
> (By the way, in case you are on the WG: the N3096 draft has
Yes, that text is weird and I also didn't have a clue as to what it
meant. So I cloned latest glibc+gcc behavior and hoped for the best.
I have avoided dealing with that WG for decades as my political skills,
such as they are, are better deployed elsewhere. But you're welcome to
file a bug report.
next prev parent reply other threads:[~2024-05-13 16:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-12 22:09 bug#70898: switching to <stdbit.h> for Emacs bit ops Paul Eggert
2024-05-13 14:34 ` Mattias Engdegård
2024-05-13 16:56 ` Paul Eggert [this message]
2024-05-14 11:11 ` Mattias Engdegård
2024-05-18 17:32 ` Paul Eggert
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